One of those big storylines left open was the fate of Liza Minnelli‘s character Lucille Austero. There’s been some speculation that “Arrested Development’s” next iteration will be a murder mystery, which Will Arnett says he’d love to see happen.

“Put it this way, we’re not going to leave it unanswered,” Arnett tells Zap2it at CBS’ TCA party of Lucille’s open-ended storyline.

So will Season 5 actually happen? Arnett was careful not to give any details away and make it clear that everything’s still up in the air. “No details on that,” he says. “We’ve just got to work out whether it’s going to happen and make sure that we kind of get all the ducks in a row on that and then get into it.”

Between his roles in “Teenage Mutant Ninja Turtles” and the upcoming CBS comedy “The Millers,” Arnett is keeping busy. He’s no stranger to television comedy, and shares how he feels “The Millers” sets itself apart from what he’s done before.

“The multi-cam format is a little different. I haven’t done it in a while, but I’m really excited to get back to doing it. It’s exciting,” he says. “It’s fun, and on top of that, working with Greg Garcia who’s writing the show, he’s such a funny guy. So I feel very, very lucky to have him. My costars are just beyond hilarious. So it’s just really great. I’m really excited about it in a real way.”

In terms of what Arnett looks for when shows are being pitched to him, he answers simply, “Funny.” He says that can be surprisingly rare in new pilots.

“Something that makes you laugh for real is not that easy to find, so I’m excited,” Arnett admits. “Coming off ‘Up All Night’ I wasn’t sure what I wanted to do. Really quickly Greg got in touch with me. I’ve known Greg a long time and he sent me the script and I couldn’t believe how funny it was right from page one. I was in.”